The sat runs off the head units CD changer controls. It doesn't need external power. Are you sure you're looking at the SRS light and not the Check Engine light. Cause if it does infact say SRS, that (unfortunately) has nothing to do with your oil. That's your airbags.
I have two fears, 1) They won't go off when I'd like them to. 2) They'll go off sometime before I'd like them to.